May Weather in Vallenar Chile

Daily high temperatures decrease by 5°F, from 58°F to 53°F, rarely falling below 46°F or exceeding 64°F.

Daily low temperatures decrease by 4°F, from 40°F to 36°F, rarely falling below 29°F or exceeding 45°F.

For reference, on January 21, the hottest day of the year, temperatures in Vallenar typically range from 49°F to 67°F, while on July 19, the coldest day of the year, they range from 33°F to 51°F.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on May. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Methven, New Zealand (6,107 miles away) is the far-away foreign place with temperatures most similar to Vallenar (view comparison).

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The month of May in Vallenar experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 29% to 40%.

The clearest day of the month is May 1, with clear, mostly clear, or partly cloudy conditions 71% of the time.

For reference, on June 9, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 40%, while on February 18, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 91%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Vallenar, the chance of a wet day over the course of May is gradually increasing, starting the month at 1% and ending it at 4%.

For reference, the year's highest daily chance of a wet day is 4% on July 18, and its lowest chance is -0% on November 29.

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during May in Vallenar is essentially constant, remaining about 0.2 inches throughout, and rarely exceeding 1.1 inches or falling below -0.0 inches.

Over the course of May in Vallenar, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 32 minutes, implying an average daily decrease of 1 minute, 5 seconds, and weekly decrease of 7 minutes, 34 seconds.

The shortest day of the month is May 31, with 10 hours, 27 minutes of daylight and the longest day is May 1, with 10 hours, 59 minutes of daylight.

The earliest sunrise of the month in Vallenar is 7:08 AM on May 1 and the latest sunrise is 17 minutes later at 7:25 AM on May 31.

The latest sunset is 6:07 PM on May 1 and the earliest sunset is 15 minutes earlier at 5:52 PM on May 31.

Daylight saving time is observed in Vallenar during 2024, but it neither starts nor ends during May, so the entire month is in daylight saving time.

For reference, on December 21, the longest day of the year, the Sun rises at 6:40 AM and sets 13 hours, 58 minutes later, at 8:38 PM, while on June 20, the shortest day of the year, it rises at 7:32 AM and sets 10 hours, 20 minutes later, at 5:52 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for May 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Vallenar is essentially constant during May, remaining around 0% throughout.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Vallenar is essentially constant during May, remaining within 0.1 miles per hour of 6.6 miles per hour throughout.

For reference, on October 9, the windiest day of the year, the daily average wind speed is 8.1 miles per hour, while on May 31, the calmest day of the year, the daily average wind speed is 6.5 miles per hour.

The hourly average wind direction in Vallenar throughout May is predominantly from the north, with a peak proportion of 50% on May 31.

Vallenar is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Vallenar is essentially constant during May, remaining within 1°F of 60°F throughout.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Vallenar typically lasts for 7.3 months (222 days), from around October 1 to around May 11, rarely starting before September 8 or after October 25, and rarely ending before April 19 or after June 8.

During May in Vallenar, the chance that a given day is within the growing season is rapidly decreasing falling from 70% to 20% over the course of the month.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Vallenar are gradually increasing during May, increasing by 41°F, from 1,191°F to 1,232°F, over the course of the month.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Vallenar is decreasing during May, falling by 1.0 kWh, from 5.0 kWh to 4.0 kWh, over the course of the month.

For the purposes of this report, the geographical coordinates of Vallenar are -28.516 deg latitude, -70.256 deg longitude, and 6,529 ft elevation.

The topography within 2 miles of Vallenar contains large variations in elevation, with a maximum elevation change of 2,766 feet and an average elevation above sea level of 6,957 feet. Within 10 miles contains large variations in elevation (8,855 feet). Within 50 miles also contains extreme variations in elevation (19,491 feet).

The area within 2 miles of Vallenar is covered by bare soil (100%), within 10 miles by bare soil (69%) and trees (15%), and within 50 miles by bare soil (63%) and trees (14%).